Resolve "Implement thinning algorithms"

Closes #445 (closed)

corsika/detail/modules/thinning/EMThinning.inl

+/*
+ * (c) Copyright 2022 CORSIKA Project, corsika-project@lists.kit.edu
+ *
+ * This software is distributed under the terms of the GNU General Public
+ * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
+ * the license.
+ */
+
+#pragma once
+
+#include <corsika/framework/core/PhysicalUnits.hpp>
+#include <corsika/framework/process/SecondariesProcess.hpp>
+
+namespace corsika {
+
+EMThinning::EMThinning(HEPEnergyType threshold, double maxWeight) : threshold_{threshold}, maxWeight_{maxWeight} {}
+
+template <typename TStackView>
+    void EMThinning::doSecondaries(TStackView& view) {
+    if (view.size() != 2) return;
+    auto particle1 = view.begin();
+    auto particle2 = std::next(particle1);
+
+    if (.getCode())
+	corsika::HEPEnergyType const E0 = 
+    
+}
+
+}